\Chapter{Outlook}
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Initial measurements of PL on chemically grown flakes indicate that they may exhibit substantially lower losses when used for waveguide fabrication. Additionally, reduced fluorescence may be attainable for antenna structures milled from the monocrystalline material.

In future we hope to compare directly the losses of rough and smooth gold waveguides, which, given the successful fabrication of gold flakes and initial \FIB\ tests, appears to be a goal attainable in the near future. The introduction of control into waveguide structures through the use of \SAW\ coupling schemes is a logical next step, and one I hope to be able to investigate in the coming year. Investigation of the fluorescence response of \FIB\ milled antenna structures is another goal, as the potential effects of gallium implantation and damage to the surface layer of the crystalline gold are as yet unclear. If I am able to fabricate antennas with reduced fluorescence without disrupting the crystal structure, I would like to investigate the coupling of quantum emitters such as NV centres in diamond nano crystals or colloidal quantum dots to antennas.

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